Volume 17 :
No 1 :
Spring 2015

April 2015 M7.8 Nepal Earthquake

An informal collection of preliminary research results and comments from the research community. Learn more »

Newly available data at IRIS for the Nepal event

Since the Nepal event, the IRISDMC acquired waveform data recorded during the mainshock (for various durations of time) from many new stations which were not initially available including:

IO.EVN: broadband station at the base of Mt. Everest operated by Ev-K2-CNR, OGS Italy

NQ.KATNP: a USGS NetQuakes station in Kathmandu

RM.SIM: a Regional Integrated Multi Hazard Early Warning System weather station

CB: China National Seismic Network (broadband)

Also, the USGS and the Quake Catcher Network (QCN) have 9 stations operating in the region, 5 of which were operational during the mainshock. Note: QCN data are currently not archived at IRIS.

Figure 1: Map of aftershocks (circles) since the April 25, 2015 M7.8 Nepal earthquake (yellow star), stations for which IRIS had data in real-time or near real-time (red triangles), stations with recently acquired data now available at IRIS (yellow triangles), and the Quake Catcher Network deployed by the USGS and colleagues following the event (blue triangles).

Figure 2: Broadband vertical trace from the closest broadband station for which IRIS has data available. The top trace shows the raw trace, which clipped, the bottom trace is a low-pass filtered version. Aftershocks are visible in both traces. Data contributed by the Ev-K2-CNR project, OGS Italy.

Download waveform data and Ground Motion Visualizations (GMVs) for the main shock and four largest aftershocks